胺基修饰超高交联吸附树脂的制备与吸附性能研究  

Preparation and adsorption performance of hypercrosslinked polymeric adsorbents modified by amino group

作　　者：雷燕[1] 付川[1] 谭瑶[1] 郝斌华 毛华平[1] 

机构地区：[1]重庆三峡学院化学与环境工程学院,重庆404000 [2]重庆万州环境保护科研所,重庆404000

出　　处：《化工新型材料》2011年第6期74-77,共4页New Chemical Materials

基　　金：教育部"春晖计划"(Z2007-1-63009)三峡库区饮用水处理新型胶原纤维吸附材料研究;重庆高校创新团队建设计划资助

摘　　要：分别以甲胺、二甲胺和三甲胺参与Friedel-Crafts后交联反应,成功制备了胺基修饰的超高交联聚苯乙烯吸附树脂LY-1、LY-2和LY-3。物化特征研究表明:三者都符合纳米吸附高分子材料特征。吸附研究表明,水体系中3种树脂对苯酚的吸附性能均优于苯胺,在相同平衡浓度下,吸附量大小顺序都为:LY-1>LY-2>LY-3。苯酚(苯胺)在3种树脂上的吸附焓ΔH均小于零且绝对值都小于40kJ/mol,以物理吸附为主。自由能变ΔG和吸附熵变ΔS都为负值,吸附是自发过程,且吸附的ΔH、ΔG、ΔS值都随胺基含量增加而减小。The hypercrosslinked polystyrene adsorbents of LY-1、LY-2 and LY-3 were prepared by Friedel-Crafts post-crosslinking reaction with methylamine dimethylamine and trimethylamine.the hypercrosslinked polymeric adsorbents modified by amino group can be viewed as nanometer polymeric resins.The physical properties of absorbents showed that three types of adsorbents can be viewed as nanometer polymeric resins.According to the adsorption experiment in aqueous solution,the adsorption capacity of phenol onto amino-modifying adsorbents was bigger than that of aniline and the sequence of adsorption capacity was LY-1LY-2LY-3.The adsorption enthalpies of ΔH for adsorption of phenol（aniline） onto the adsorbents were all negative and their absolute values were lower than 40 kJ/mol,which indicated that the adsorption was exothermic process and the physical adsorption was dominant in the adsorption process.Both The Gibbs free energy change of ΔG and adsorption entropy change ΔS of the adsorption were also less than zero which demonstrated that the adsorption was a spontaneous process.The value of ΔH,ΔG and ΔH for adsorption of phenol（aniline） onto adsorbents decreased with the increasing of the amido group content of these three types of resin.

关 键 词：胺基 超高交联吸附树脂 吸附 苯酚 苯胺 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业] O647.32[理学—物理化学]